精密控制震源发射信号设计方法研究

Study on the design of chirp signal for CASS

考虑到精密控制震源特点,研究了多种精密控制震源发射信号的设计方案,并提出离散点拟合精密控制震源信号设计方法。计算表明,按照发射频谱、相关子波形态和发射能量3个方面的评价,离散点拟合精密控制震源信号设计方法可以灵活设计出比较好的精密控制震源发射信号,对提高精密主动地震监测的震相信息分辨率具有实际意义。

Taking the features of Controlled Accurately Seismic Source （CANS） into account, various design methods of chirp signal for CASS are discussed, and a new method with fitting of discrete points to design chirp signal for CASS is given out in this paper. It is demonstrated that the new method is able to design better chirp signal for CASS assessed by radiated spectrum and energy, wavelet of cross-correlation. It is practicable and meaningful in improvement of phase resolution in actively seismic monitoring.